/Engine/Source/Runtime/Engine/Classes/Animation/CustomAttributesRuntime.h
Interpolates between two sets of attributes
static void InterpolateAttributes ( const [UE::Anim::FHeapAttributeContainer](API\Runtime\Engine\Animation\FHeapAttributeContainer) & SourceAttributes, [UE::Anim::FHeapAttributeContainer](API\Runtime\Engine\Animation\FHeapAttributeContainer) & OutAttributes, float Alpha )